| 摘要 |
This invention relates to a pumping unit comprising: a base (1) and a rack (2); an electric motor (17) with varying frequency power for the pumping unit through a speed reducer (5); a driving hub (7A) connector with said speed reducer (5) for driving a belt (10A) and the other belt (11) with one end connected with a balance weight box; a driven hub (7B) connected to said driving hub (7A) for driving a belt (10B) with one end attached to a sucker rod; an upper platform (3) in which said electric motor (17), said speed reducer (5), said driving hub (7A) and said driven hub (7B) are installed; a driving frequency converter (18) connected with a programmable controller (20) that is connected with an absolute value encoder (16) for dealing with the running conditions of the pump unit. The pumping unit can be automatically controlled by the programmable controller with energy conservation, high efficiency and durability.
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